Document Detail


The effects of a 20-min nap at noon on sleepiness, performance and EEG activity.
MedLine Citation:
PMID:  10380949     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The prophylactic effects of a 20-min nap at noon on afternoon sleepiness were studied. Ten young adults who had normal sleep-wake habits without habitual daytime napping were subjected to nap and no-nap conditions at an interval of 1 week. After a nocturnal sleep recording (00.00-08.00 h), their EEG recordings during relaxed wakefulness, mood, performance, and self-ratings of performance level were measured every 20 min from 10.00 h to 18.00 h. For the nap condition, they went to bed at 12.20 h and were awakened when 20 min had elapsed from the onset of sleep stage 1. For the no-nap condition, they rested without sleeping by sitting on a semi-reclining chair. The nap did not improve task performance, however, it improved volition and the self-rating of task performance. It also suppressed subjective sleepiness and attenuated eyes-opened EEG alpha activities. The results suggest that a 20-min nap at noon had partial positive effects on the maintenance of the daytime arousal level.
Authors:
M Hayashi; S Ito; T Hori
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Publication Detail:
Type:  Clinical Trial; Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  International journal of psychophysiology : official journal of the International Organization of Psychophysiology     Volume:  32     ISSN:  0167-8760     ISO Abbreviation:  Int J Psychophysiol     Publication Date:  1999 May 
Date Detail:
Created Date:  1999-07-27     Completed Date:  1999-07-27     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8406214     Medline TA:  Int J Psychophysiol     Country:  NETHERLANDS    
Other Details:
Languages:  eng     Pagination:  173-80     Citation Subset:  IM    
Affiliation:
Department of Behavioral Sciences, Faculty of Integrated Arts and Sciences, Hiroshima University, Higashi-hiroshima, Japan.
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MeSH Terms
Descriptor/Qualifier:
Adult
Affect / physiology*
Alpha Rhythm / psychology*
Female
Humans
Male
Rest / physiology,  psychology*
Sleep / physiology*
Time Factors

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